that vid is nearly 4 years old so don’t take too much from it but you are right that is an issue I struggle with and having been working on. I’ll take some vids in SPP.
Interestingly I was just at a presentation given by someone who has just spent time with Dan Pfaff who said he works on a narrow angle (close to face) at top and opening on way down, reckons that is more in keeping with leg mechanics and that retaining 90 deg is incorrect.
No never done stride count.